I'm trying to run wii party from DVD using HBD but I was unable to find a guide. I mean, it asks to run System Update and, without it I'm not able to play the game. How can I play the game without having to do the system update?
Install priiloader. You will find the guide in my signature.
(I see that this is 2 and a half days old, but this is by and far the most recommended fix for this issue you will find)
Give credit where credit is due. If it helps you, click "thanks" on ANY guide I link.